How to replace a broken car air conditioner evaporator?

The car air conditioner evaporator is a crucial component in the vehicle's air circulation system, and its replacement involves refrigerant handling and precise disassembly and assembly. The following is a detailed replacement process:

1. Preparation and Safety Measures
Before starting, thorough preparation is necessary to ensure safety and quality of repair.

Tool preparation: Prepare professional tools such as wrenches, screwdrivers, sealant, and a vacuum pump.
Refrigerant handling:  The refrigerant in the system must be discharged and handled environmentally using professional equipment; direct leakage is prohibited.
Dashboard removal:  It is usually necessary to remove the dashboard or instrument panel to expose the evaporator's location.
2. Removing the Old Evaporator
The removal process requires special attention to avoid damaging other components. Rapid Sealing: When removing the old evaporator, the pipelines must be quickly sealed to prevent impurities from entering the air conditioning system.
Wiring Harness Attention: When disconnecting the wiring harness and pipes connected to the evaporator, record the interface positions to prevent confusion during assembly.
Cleaning: After removing the old parts, clean the installation location to ensure there is no residual old sealant or dirt.
3. Installing the New Evaporator and Sealing
Installation is a critical step in ensuring air conditioning performance.

Sealing Treatment: When installing the new evaporator and connecting the pipes, ensure a good seal using high-quality sealant to prevent leaks.
Part Matching: The new evaporator must match the vehicle model, and ensure the installation angle and position are correct to avoid affecting airflow.
Connection Check: Confirm that all pipes and wiring harnesses are connected correctly and that there are no missing connections.
4. Vacuuming and Refrigerant Charging
After replacement, the system needs to be restored to working condition.

Vacuuming: After installation, use a vacuum pump to remove air and moisture from the system, ensuring that the vacuum level inside the system meets the standard.
Refrigerant Charging: After vacuuming, add the appropriate amount of refrigerant and ensure that the pressure gauge reading is within the normal range.
Testing and Inspection: Start the car's air conditioning system and check if the cooling effect is normal and if there are any leaks or other problems.